US2420431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection timing
Assignee: RTX Corp
•
Filing: 1944-01-28
•
Granted: 1947-05-13
•
Expires: 1964-01-28
Abstract
No abstract record available.
Inventors
- 👤 Kalitinsky Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:54
CPC Classifications
F; F02; F02M; F02M49/00; F02M49/02; F02M47/00; F02M47/02; F02M59/00; F02M59/02; F02M59/10; F02M59/107; F02M2700/00; F02M2700/07; F02M2700/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US183055A
Cited
US345253A
Cited
US348726A
Cited
US1856852A
Cited
GB312573A
Cited
US1990714A
Cited
US2067997A
Cited
US2230920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |